<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <h1>Hello World</h1>
    <p>Here is page 1.</p>
    <!-- <form>
        <input type="button" onclick="alert('Hello World!')" value="Go to page 2">
        <input type="button" onclick="alert('Hello World!')" value="Go to page 3">
    </form>
    <h1>This is new line.</h1>
    <h2>This is new line.</h2>
    <h3>This is new line.</h3>
 -->
    <!-- <form method="get"> -->
    <form method="post">

        Name:<br>
        <input type="text" name="firstname" value="Username">
        <br>
        Passwd:<br>
        <input type="password" name="lastname">
        <br><br>
        <input type="submit" value="Submit">
    </form>
    <center>
        <div>
            <img src="./image/helloworld.png"> <!-- 图片 -->
            <h4>Hello World</h4>
        </div>
    </center>
</body>

</html>